Spring-hinge.



- Patented Sept. I2, |899. A. ROBINSON.

SPRING HINGE.

(Application tiled Mar. 4, 1899.)

(No Model.)

' lIlIIlIIIi NrrED STATES PATEN ERICE.

SPRING- HINGE.

SPECIFICATION forming part of Letters Patent No. 632,850, dated September 12, 1899.

Application filed March 4, 1899. Serial No. 707,816. (No model.)

T0 a/ZZ whom t may concern:

Be it known that I, ALBERT ROBINSON, a citizen of the United States, residing at Arbela, in the county of Scotland and State of Missouri, have invented a new and useful Spring-Hinge, of which the following is a specification.

My invention relates to improvements in gate-hinges, in which a horizontal rod carrying a coil-spring is attached to a hinge; and the object of my improvement is to afford facilities for the attachment of a coil-spring to a hinge, so that it may close a gate automat- Y ically. I attain this object by the mechanism illustrated in the accompanying drawings, in Which- Figure 1 is a front view of the hinge; Fig. 2, a top view When the gate is closed, and Fig. 3 a top view when the gate is standing at an angle of ninety degrees With the fence.

Similar letters refer to similar parts.

v The members A B connect by the joint From the sides of the member A project the arms h h, which connect by a hinge-joint With the upright E, having the horizontal rod e, passing through the coil-spring f and then protruding through the hole in the end of the arm c, which is a continuation at an angle of ninety degrees of the member B. The arms o and b h are of the same length, so that the member B and the rod e may be parallel when the gate is closed, Figs. 1 and 2, and the distance from the joint i to the center of the armsb b, Where they attach to the member A, is equal to the length of any one of the arms c or h b, so that the member B and the rod e may be parallel when the gate is standing at an angle of ninety degrees with the fence,l Fig. 3.

The member A may be attached to the gate and B to the post, or vice versa. In either instance Vwhen the gate is opened the pivots ce a of the upright E turn in the holes in the arms b b, the rod e slides in the hole in the arm o, the spring f being compressed between the arm c, and the upright E closes the gate.

It is evident that if the gate be opened to that degree where the upright E reaches a point in the line connecting the joint and the center of the hole in the arm o the spring expands and tends to throw the gate open.

Having described my invention, what I claim as new, and desire to secure by Letters Patent, is

In a spring-hinge, the combination, With a hinge formed by the member, A, having arms b h, and the member B, having arm o, of a rod e, pivoted at one extremity to the arms b h, by means of the upright E, and movable longitudinally through a hole in the arm c, and the coil-spring f, adapted to said rod and compressible between the upright E, and the arm c, whereby the gate may be closed asset forth.

ALBERT ROBINSON.

Witnesses :Y

ALBERT V. DOUGLAS, CHARLIE OvERHULsER. 

